Csharp SharpZipLib在文件名前加上目录名，生成tar.gz

You might need to modify the way you set the entry.Name, i.e. setting the entry.Name with the prefixed directory.
The key would be to make sure the full path, including the directory name, is correctly assigned to each entry in the archive.

var archiveName = $"bin/{projectVersion}.tar.gz";
using var archiveStream = File.Create(archiveName);
using var gzipStream = new GZipOutputStream(archiveStream);
using var archive = TarArchive.CreateOutputTarArchive(gzipStream);

foreach (var filePath in Directory.GetFiles(publishPath)) {
    var entry = TarEntry.CreateEntryFromFile(filePath);
    // Make sure the directory structure is preserved in the entry's name
    entry.Name = $"{projectVersion}/{Path.GetFileName(filePath)}";
    archive.WriteEntry(entry, true);
}

That now takes each file in publishPath, prefixes it with the projectVersion directory, and sets the entry.Name.
That makes sure upon extraction, the directory structure foo-1.0/ will be created, and files will be placed inside it.

此外，Directory.GetFileSystemEntries(publishPath)被更改为Directory.GetFiles(publishPath)，以确保只处理文件，而不是目录.这应该可以避免目录条目的潜在问题.